A trailer may include a tailgate stabilizing mechanism to reduce movement of the tailgate during transport in order to reduce wear and tear. A knob is mounted at or near an edge of the tailgate. A cup which may be mounted at or formed in a mating gusset, bracket, or flange, is sized and shaped fittingly to receive the knob. The mating gusset, bracket, or flange is mounted to the container and positioned to receive the knob in the cup when the tailgate is closed. A locking mechanism may be configured to press on the tailgate when closed so as to compress the knob in the cup to reduce further movement of the tailgate. The knob may be removable and replaceable, and thus may be replaced following wear and tear of the knob.